package com.learn.config;

import com.learn.io.Resources;
import com.learn.pojo.Configuration;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import sun.awt.datatransfer.DataTransferer;

import javax.xml.bind.annotation.XmlAccessOrder;
import java.beans.PropertyVetoException;
import java.io.InputStream;
import java.sql.SQLException;
import java.util.List;
import java.util.Properties;

public class XMLConfigBuilder {

    private Configuration configuration;

    public XMLConfigBuilder(){
         this.configuration = new Configuration();
    }
    /**
     * 配置文件解析
     * @param inputStream
     * @return
     */
    public Configuration parseConfig(InputStream inputStream) throws DocumentException, PropertyVetoException, SQLException {

        Document document = new SAXReader().read(inputStream);
        Element rootElement = document.getRootElement();
        List<Element> list = rootElement.selectNodes("//property");
        Properties properties = new Properties();
        for(Element element: list){
            String name = element.attributeValue("name");
            String value = element.attributeValue("value");
            properties.setProperty(name, value);
        }
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setDriverClass(properties.getProperty("driverClass"));
        comboPooledDataSource.setJdbcUrl(properties.getProperty("jdbcUrl"));
        comboPooledDataSource.setUser(properties.getProperty("user"));
        comboPooledDataSource.setPassword(properties.getProperty("password"));

        comboPooledDataSource.getConnection(properties.getProperty("user"), properties.getProperty("password"));
        configuration.setDataSource(comboPooledDataSource);

        //mapper.xml 解析
        List<Element> mapperList = rootElement.selectNodes("//mapper");

        for(Element element: mapperList){
            String mapperPath = element.attributeValue("resource");
            InputStream resourceAsStream = Resources.getResourceAsStream(mapperPath);
            XmlMapperBuilder xmlMapperBuilder = new XmlMapperBuilder(configuration);
            xmlMapperBuilder.parse(resourceAsStream);
        }

        return configuration;
    }
}
